package com.mall.order.biz.handler;

import com.mall.commons.tool.exception.BizException;
import com.mall.order.biz.context.CreateOrderContext;
import com.mall.order.biz.context.TransHandlerContext;
import com.mall.order.constant.OrderRetCode;
import com.mall.order.constants.GlobalConstants;
import com.mall.order.dto.CartProductDto;
import com.mall.shopping.ICartService;
import com.mall.shopping.dto.ClearCartItemRequest;
import com.mall.shopping.dto.ClearCartItemResponse;
import lombok.extern.slf4j.Slf4j;
import org.apache.dubbo.config.annotation.Reference;
import org.redisson.api.RedissonClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 *
 * 将购物车中的缓存失效
 */
@Slf4j
@Component
public class ClearCartItemHandler extends AbstractTransHandler {

    @Autowired
    RedissonClient redissonClient;

    //是否采用异步方式执行
    @Override
    public boolean isAsync() {
        return false;
    }

    private String generatorCartItemKey(long userId) {
        StringBuilder sb = new StringBuilder(GlobalConstants.CART_ITEM_CACHE_PREFIX);
        sb.append(":").append(userId);
        return sb.toString();
    }

    @Override
    public boolean handle(TransHandlerContext context) {
        CreateOrderContext createOrderContext = (CreateOrderContext) context;
        List<CartProductDto> dtoList = createOrderContext.getCartProductDtoList();
        List<Long> productIds = dtoList.stream().map(u -> u.getProductId()).collect(Collectors.toList());
        Map<Object, Object> redissonClientMap = redissonClient.getMap(generatorCartItemKey(createOrderContext.getUserId()));
        for (Long productId : productIds) {
            redissonClientMap.remove(productId);
        }
        return true;
    }
}
